title: A study on the magnetic behaviour of polymorphic YbFe6Ge6.
abstract: The intermetallic compound YbFe(6)Ge(6) adopts two very closely related hexagonal crystal structures, HfFe(6)Ge(6)-type and YCo(6)Ge(6)-type. In both structures the Fe sublattice orders antiferromagnetically at 485(2) K. The Yb sublattice does not order magnetically, down to 1.5 K. In the HfFe(6)Ge(6)-type structure, the Fe magnetic moments undergo a spin reorientation away from the C-axis upon cooling, commencing at around 60 K, whereas in the YCo(6)Ge(6)-type structure the Fe moments remain ordered along the C-axis, or quite close to it.
authors.affiliation: Department of Physics and Astronomy, University of Manitoba, Winnipeg, MB, Canada. cadogan@physics.umanitoba.ca
authors.forename: J M
authors.initials: JM
authors.lastname: Cadogan
authors.forename: D H
authors.initials: DH
authors.lastname: Ryan